The DiY threads over at AVS are really where I recommend people go to find out all they need to about the options you have available. I followed some instructions for building a DiY screen once out of blackout cloth and it turned out very nice.
That said, I would never do it again as the price for standard white screens with really decent frames can be had for just two or three hundred bucks.
Still, they have all types of people that are seriously into painted screens and testing different formulas, etc. They have people that build frames and paint surfaces, and use various cloths, and really can give you far more information than I can.
For me, the hours it takes to build a screen is better served by just buying a prefab screen.
Be aware, that lit rooms are always a huge compromise to image quality. So, a screen that helps combat the existing light trades off some image quality for brightness and acts like a band aid instead of a fix. This is a choice that is fine to make, but it should be something to always be aware of. You will never match a dark room with dark paint on the walls/ceiling by using a special screen.
But, you can still get very acceptable results.
Not sure why I missed the photo, but it looks like you have a very dark/black theater space. If that's the setup, then there is no reason at all you should be looking at a high gain or a black screen. You really should be sticking with a white screen with as much neutrality as possible. Your biggest issue may be the projector itself if you aren't getting enough 'pop' from the image.
Just an FYI: If you have a 720p projector, it would downscale 1080p content to 720p, not upscale it. Hope that makes sense.
[Edited by AV_Integrated on Jan 11, 2018 at 9:37 AM]
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